.exercise {
  flex-direction: row;
  margin-top: 6px;
}
.exercise .nav_left {
  display: inline-flex;
  flex-wrap: wrap;
  flex-direction: row;
  width: 246px;
  height: 140px;
  background-color: #f9f9f9;
  transform: translate(7px);
  margin-right: 12px;
  margin-bottom: 33px;
}
.exercise .nav_left li {
  display: inline-flex;
  width: 123px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.exercise .nav_left li img {
  width: 24px;
  height: 24px;
}
.exercise .nav_left li a {
  text-decoration: none;
  color: black;
}
